Andrew G Deczky

Title: Innovations by Andrew G Deczky

Introduction

Andrew G Deczky is a notable inventor based in Nepean, Canada. He has made significant contributions to the field of communications systems, holding a total of 3 patents. His work focuses on enhancing digital signal processing and echo cancellation technologies.

Latest Patents

One of Deczky's latest patents is a "Digital receive filter for communications systems." This invention comprises first and second filter parts with a down sampler between them. Each filter part is formed by a plurality of cascaded filter stages, each comprising a second-order finite impulse response digital filter with symmetrical coefficients. These coefficients are often integer powers of two, and in some cases, they are zero or a sum of integer powers of two. The filter stages are implemented using delay units and add units, which shift bits at the inputs of the add units to implement the coefficients, thereby avoiding the need for multipliers. This receive filter features two filter stages in the first part, a down sampling factor of two, and seven filter stages in the second part, with scaling factors and ordering designed to facilitate filtering and minimize noise.

Another significant patent is the "Apparatus and method for echo cancellation." This invention addresses echoes with exceptionally long tails, such as those generated by 2B1Q signals in ISDN systems. The echo canceller includes a first echo cancelling means, typically a transversal filter, which operates over a first number of baud periods. Additionally, it features filter means, conveniently an infinite impulse response filter, which operates over a later number of baud periods. This filter means responds to each symbol of the transmitted signal to generate a pulse response that decays exponentially according to a predetermined function. The echo canceller also includes means for subtracting the outputs of the first echo cancelling means and the filter means from the received signal.

Career Highlights

Andrew G Deczky is currently employed at Northern Telecom Limited, where he continues to innovate in the field of telecommunications. His work has significantly impacted the efficiency and effectiveness of communication systems.

Collaborations

Deczky has collaborated with notable coworkers such as Sami A Aly and Stephen G Rayment, contributing to advancements in their shared field of expertise.

Conclusion

Andrew G Deczky's contributions to digital signal processing and echo cancellation have made him a prominent figure in the telecommunications industry. His innovative patents reflect his commitment